FILE - This March 10, 2011, file photo shows BYU's Jimmer Fredette putting up a three point shot over TCU's J.R. Cadot during the first half of an NCAA college basketball game in the second round of the Mountain West Conference tournament, in Las Vegas. Instead of only defending the basket and the lane, teams have to also worry about defending the 3s. (AP Photo/Julie Jacobson, File) less

FILE - This March 10, 2011, file photo shows BYU's Jimmer Fredette putting up a three point shot over TCU's J.R. Cadot during the first half of an NCAA college basketball game in the second round of the ... more

Photo: Julie Jacobson

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Vanderbilt guard John Jenkins (23) reacts after scoring against Mississippi State during the second half of an NCAA college basketball game at the Southeastern Conference tournament, Friday, March 11, 2011, in Atlanta. (AP Photo/John Bazemore) less

Vanderbilt guard John Jenkins (23) reacts after scoring against Mississippi State during the second half of an NCAA college basketball game at the Southeastern Conference tournament, Friday, March 11, 2011, in ... more

Photo: John Bazemore

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Ohio State guard Jon Diebler celebrates hitting a 3-point shot at the buzzer to end the first half of an NCAA college basketball game against Penn State in the championship of the Big Ten tournament in Indianapolis, Sunday, March 13, 2011. (AP Photo/AJ Mast) less

Ohio State guard Jon Diebler celebrates hitting a 3-point shot at the buzzer to end the first half of an NCAA college basketball game against Penn State in the championship of the Big Ten tournament in ... more

Photo: AJ Mast

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Long distance their call

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BYU's Jimmer Fredette and Vanderbilt's John Jenkins rarely get to the 3-point line before they are being hounded by a defender.

Leave them alone, they're likely to take a long shot and score. Pay too much attention, they're likely to find an open teammate closer to the basket.

A quarter-century of 3-pointers in college basketball and deep-shooting threats like Fredette, Jenkins, Ohio State's Jon Diebler and Ben Hansbrough at Notre Dame have certainly changed how coaches prepare their defenses.

That is an emphasis for the Pac-10 champions under second-year coach Sean Miller, who led Xavier to four consecutive NCAA Tournaments before moving to the desert. The Wildcats are among the nation's best, allowing opponents to make only 29 percent of their 3-pointers.

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"You've just got to be relentless. Coach, that's what he preaches and preaches every day," Jones said.

While Vanderbilt has one of the nation's top individual 3-pointer shooters in Jenkins (3.1 per game), the Commodores are tenacious defensively beyond the arc.

"When there was no 3-point line, you really wanted to defend the basket and you wanted to defend the lane area," Vandy coach Kevin Stallings said. "The 3-point line has changed some philosophies defensively."

In their opening NCAA Tournament game, the No. 5-seeded Commodores will get their long-range defense tested by Richmond, which is 10th nationally making 40 percent of its 3-pointers.

Arizona, BYU and Vanderbilt are all in different regionals for this year's NCAA Tournament, the 25th since the 3-point shot was instituted by the NCAA. That bracket separation is probably good news for the Wildcats, also a No. 5 seed and opening against Memphis.

Fredette had a career-high nine 3-pointers against Arizona in a 49-point game in December 2009. He had another 33 points vs. Arizona this season, though he had only three 3-pointers in that game.

Fredette, the nation's leading scorer with 28.5 points and 3.3s a game, will take shots from well beyond the arc.

"I feel like I've always been able to shoot those types of shots," Fredette said. "But this year I'm having more of a green light to shoot them because coach saw that I can make them and my teammates have confidence that I can make them, and (defenses) have to guard me out there."

BYU opens the NCAA Tournament against Wofford, which is sixth nationally making 41 percent of its 3-pointers.

With defenders picking up shooters outside the 3-point line, more space opens up and can provide the opportunity for more offensive options.

Jenkins has worked to become more than a 3-point shooter because of some of the ways opposing teams work to defend him. That may include driving to the basket more often when he sees an open gap.

The sophomore shooter who leads the SEC in scoring (19.5) is picked up by defenders "in weird areas, probably areas that most people don't get picked up." And not only when he has the ball.

"They do whole bunch of things. I can't name them all, but it's crazy. ... I've gotten a box and one, stuff like that. Basically, they try to eliminate any shots I can have," Jenkins said. "Like, if someone drives, they won't leave me to give help. They'll stay on me, basically just shadowing me wherever I go."